/*
 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

package sun.jvm.hotspot.tools.soql;

import java.io.*;
import java.util.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.tools.*;
import sun.jvm.hotspot.utilities.*;
import sun.jvm.hotspot.utilities.soql.*;

This is command line SOQL (Simple Object Query Language) interpreter.
/** This is command line SOQL (Simple Object Query Language) interpreter. */
public class SOQL extends Tool { public static void main(String[] args) { SOQL soql = new SOQL(); soql.execute(args); } public SOQL() { super(); } public SOQL(JVMDebugger d) { super(d); } protected SOQLEngine soqlEngine; protected BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); protected PrintStream out = System.out; static protected String prompt = "soql> "; static protected String secondPrompt = "> "; public void run() { soqlEngine = SOQLEngine.getEngine(); while (true) { try { out.print(prompt); String line = in.readLine(); if (line == null) { return; } StringTokenizer st = new StringTokenizer(line); if (st.hasMoreTokens()) { String cmd = st.nextToken(); if (cmd.equals("select")) { handleSelect(line); } else if (cmd.equals("classes")) { handleClasses(line); } else if (cmd.equals("class")) { handleClass(line); } else if (cmd.equals("object")) { handleObject(line); } else if (cmd.equals("quit")) { out.println("Bye!"); return; } else if (cmd.equals("")) { // do nothing ... } else { handleUnknown(line); } } } catch (IOException e) { e.printStackTrace(); return; } } } protected void handleSelect(String query) { StringBuffer buf = new StringBuffer(query); String tmp = null; while (true) { out.print(secondPrompt); try { tmp = in.readLine(); } catch (IOException ioe) { break; } if (tmp.equals("") || tmp.equals("go")) break; buf.append('\n'); buf.append(tmp); } query = buf.toString(); try { soqlEngine.executeQuery(query, new ObjectVisitor() { public void visit(Object o) { if (o != null && o instanceof JSJavaObject) { String oopAddr = ((JSJavaObject)o).getOop().getHandle().toString(); out.println(oopAddr); } else { out.println((o == null)? "null" : o.toString()); } } }); } catch (SOQLException se) { se.printStackTrace(); } } protected void handleClasses(String line) { // just list all InstanceKlasses InstanceKlass[] klasses = SystemDictionaryHelper.getAllInstanceKlasses(); for (int i = 0; i < klasses.length; i++) { out.print(klasses[i].getName().asString().replace('/', '.')); out.print(" @"); out.println(klasses[i].getAddress()); } } protected void handleClass(String line) { StringTokenizer st = new StringTokenizer(line); st.nextToken(); // ignore "class" if (st.hasMoreTokens()) { String className = st.nextToken(); InstanceKlass klass = SystemDictionaryHelper.findInstanceKlass(className); if (klass == null) { out.println("class " + className + " not found"); } else { // klass.iterate(new OopPrinter(out), true); // base class InstanceKlass base = (InstanceKlass) klass.getSuper(); if (base != null) { out.println("super"); out.print("\t"); out.println(base.getName().asString().replace('/', '.')); } // list immediate fields only U2Array fields = klass.getFields(); int numFields = (int) fields.length(); ConstantPool cp = klass.getConstants(); out.println("fields"); if (numFields != 0) { for (int f = 0; f < numFields; f++){ Symbol f_name = klass.getFieldName(f); Symbol f_sig = klass.getFieldSignature(f); StringBuffer sigBuf = new StringBuffer(); new SignatureConverter(f_sig, sigBuf).dispatchField(); out.print('\t'); out.print(sigBuf.toString().replace('/', '.')); out.print(' '); out.println(f_name.asString()); } } else { out.println("\tno fields in this class"); } } } else { out.println("usage: class <name of the class>"); } } protected Oop getOopAtAddress(Address addr) { OopHandle oopHandle = addr.addOffsetToAsOopHandle(0); return VM.getVM().getObjectHeap().newOop(oopHandle); } protected void handleObject(String line) { StringTokenizer st = new StringTokenizer(line); st.nextToken(); // ignore "object" if (st.hasMoreTokens()) { String addrStr = st.nextToken(); Address addr = null; Debugger dbg = VM.getVM().getDebugger(); try { addr = dbg.parseAddress(addrStr); } catch (Exception e) { out.println("invalid address : " + e.getMessage()); return; } Oop oop = null; try { oop = getOopAtAddress(addr); } catch (Exception e) { out.println("invalid object : " + e.getMessage()); } if (oop != null) { oop.iterate(new OopPrinter(out), true); } else { out.println("null object!"); } } else { out.println("usage: object <address>"); } } protected void handleUnknown(String line) { out.println("Unknown command!"); } }